A184458 Half the number of (n+1)X(n+1) binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks

3, 35, 3090, 1181303, 1925704384, 13061240432092, 364710845961492808, 41619801566809753837565, 19314484317434151178477352552

Offset

1,1

Comments

Diagonal of A184467

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for 3X3
..0..0..0....0..1..0....0..0..0....0..1..0....0..0..1....0..1..1....0..1..0
..1..1..0....1..0..1....1..0..1....0..1..0....0..1..1....1..0..1....1..0..1
..0..1..0....0..1..0....1..1..1....0..1..0....1..0..0....1..0..0....1..0..1
...
...E..M.......E..E.......M..M.......E..E.......M..P.......E..P.......E..E...
...P..E.......E..E.......P..P.......E..E.......E..E.......E..M.......E..E...

Crossrefs

Sequence in context: A068726 A263512 A093583 * A132940 A132941 A068002

Adjacent sequences: A184455 A184456 A184457 * A184459 A184460 A184461

Keyword

nonn

Author

R. H. Hardin Jan 15 2011

Status

approved